mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-08 03:28:40 +02:00
9ce34c63c9
Every startup code must now provide an additional entry point called "_dynamic_start" that is set as new the entry point if the program links to a Pascal shared library. Its purpose is to set up an exit hook usually passed via a register, which should be called during program finalization if non-nil. We use this additional entry point because this register only has meaningful content when there are any compile-time linked shared libraries, otherwise it often contains random garbage. The difference between the _dynamic_start and the original code is minimal; actually in all implementations the _dynamic_start code passes on control to the old startup code, so we use an additional entry point instead of an additional startup file. Detailed changes and fixes list: compiler: always link to the dynamic loader (ld.so) when compiling shared libraries. Fixes crashes in the loader during shared library finalization on some Linuxes remove additional ENTRY() section in arm linker script select either _dynamic_start or _start as entry point depending on whether this is a static or dynamic executable powerpc*: do not set System.isLibrary in startup code, it will be set during library initialization anyway trap in case of reaching code locations that should not be reached instead of looping (possibly endlessly) powerpc: register atexit() function pointer if supplied to the executable and call it during shutdown correctly set argc/argv/envp in shared library code and return correctly to the caller after initialization pass on exitcode in shared library haltproc use the more recent exit_group system call if available for shutdown powerpc64 fix .ptrgl stub, do not set the environment register to the value of the GOT entry in the function descriptor arm do not set System.isLibrary in startup code, it will be set during library initialization anyway reload exitcode to pass to shutdown mips,mipsel,sparc added stubs to allow correct linking git-svn-id: trunk@19036 -
82 lines
2.2 KiB
ActionScript
82 lines
2.2 KiB
ActionScript
/*
|
|
* This file is part of the Free Pascal run time library.
|
|
* Copyright (c) 2011 by Thomas Schatzl,
|
|
* member of the Free Pascal development team.
|
|
*
|
|
* Startup code for shared libraries, ARM version.
|
|
*
|
|
* See the file COPYING.FPC, included in this distribution,
|
|
* for details about the copyright.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
.file "dllprt0.as"
|
|
.text
|
|
.globl _startlib
|
|
.type _startlib,#function
|
|
_startlib:
|
|
.globl FPC_SHARED_LIB_START
|
|
.type FPC_SHARED_LIB_START,#function
|
|
FPC_SHARED_LIB_START:
|
|
mov ip, sp
|
|
stmfd sp!,{fp, ip, lr, pc}
|
|
sub fp, ip, #4
|
|
|
|
/* a1 contains argc, a2 contains argv and a3 contains envp */
|
|
ldr ip, =operatingsystem_parameter_argc
|
|
str a1, [ip]
|
|
|
|
ldr ip, =operatingsystem_parameter_argv
|
|
str a2, [ip]
|
|
|
|
ldr ip, =operatingsystem_parameter_envp
|
|
str a3, [ip]
|
|
|
|
/* save initial stackpointer */
|
|
ldr ip, =__stklen
|
|
str sp, [ip]
|
|
|
|
/* call main and exit normally */
|
|
bl PASCALMAIN
|
|
ldmdb fp, {fp, sp, pc}
|
|
|
|
.globl _haltproc
|
|
.type _haltproc,#function
|
|
_haltproc:
|
|
/* reload exitcode */
|
|
ldr r0,=operatingsystem_result
|
|
ldr r0,[r0]
|
|
swi 0x900001
|
|
b _haltproc
|
|
|
|
.globl _haltproc_eabi
|
|
.type _haltproc_eabi,#function
|
|
_haltproc_eabi:
|
|
/* reload exitcode */
|
|
ldr r0,=operatingsystem_result
|
|
ldr r0,[r0]
|
|
mov r7,#248
|
|
swi 0x0
|
|
b _haltproc_eabi
|
|
|
|
.data
|
|
|
|
.type operatingsystem_parameters,#object
|
|
.size operatingsystem_parameters,12
|
|
operatingsystem_parameters:
|
|
.skip 3*4
|
|
.global operatingsystem_parameter_envp
|
|
.global operatingsystem_parameter_argc
|
|
.global operatingsystem_parameter_argv
|
|
.set operatingsystem_parameter_envp,operatingsystem_parameters+0
|
|
.set operatingsystem_parameter_argc,operatingsystem_parameters+4
|
|
.set operatingsystem_parameter_argv,operatingsystem_parameters+8
|
|
|
|
.bss
|
|
|
|
.comm __stkptr,4
|
|
|